/Engine/Source/Runtime/SignalProcessing/Public/DSP/Reverb.h
struct FFDNDelayData
FDelayAPF[4]
APF
4 feedback delay lines per input channel (stereo) which feed into each other using a normalized feedback matrix
float[4]
DelayLineInputs
float[4]
DelayLineOuputs
FOnePoleLPF
InputLPF
Input LPF for early reflections.
FOnePoleLPF[4]
LPF
FDelay
PreDelay
Pre-Delay for the input audio to the FDN reverberator.